Hmm, perhaps a little hasty in that last email: turns out we're on 0.8.9, not 0.8.8, and I forgot to mention an additional syntax for options:
I found myself getting confused about whether to use "=" or ":" in the optional syntax:
Whereas now we also support "="
For those who get confused (like me) the answer is to always use "=".
Both syntaxes are supported, but eventually the ":" syntax will be phased out and we can use it for something more exciting.